患者男性，42岁，反复上腹痛10年，多为夜间痛，饥饿痛，进食后缓解，近2个月来

影响物质性质的因素有：A.离子的种类不同；B.分子的构成不同；C.溶质的质量分数不同等，请从中选择导致下列物质性质差异的因素（填序号）.

①一氧化碳具有可燃性而二氧化碳不具有可燃性：                 ；

②FeSO₄为绿色而Fe₂（SO₄）₃为黄色：                            ；

③浓硫酸有吸水性而稀硫酸没有：                               .

雅典公民大会最重要的程序是（）

A.辩论

B.抽签

C.记录

D.表决

产褥期的临床表现正确的是（）

A.产后第1日，宫底稍下降

B.产后初期产妇脉搏增快

C.产后宫缩痛多见于初产妇

D.子宫复旧因哺乳而加速

E.恶露通常持续1~2周

焊接电流的大小对焊接质量及生产率有较大影响，其中最主要的因素有( )。

A．焊接层次

B．焊缝空间位置

C．焊条直径

D．焊条类型

The problem is my weight. I’m just 1.57 meters high, but51. ______
my weight is 75 kilos. Many students often make a fun 52. ______
of me. Some boys were unfriendly for me—they call 53. ______
me "meat ball". That makes me to feel unhappy. 54. ______
Although I’m a bit too fat, yet I feel very well. I 55. ______
enjoy my meal. I love eating meat very much. And I like 56. ______
sweet food, though. I often have sugar with tea, milk. In57. ______
the past two months I had put on 5 kilos. So I’m becoming58. ______
more and more worried this problem, but I don’t 59. ______
know to lose weight quickly. Could you help me, dear doctor. 60. ______